Centrifugal pump.



Patented Sept. 26, I899.

P w m nu E 6 C U NAM. w w h m (No Model.)

,To aZZ whom it may concern: 1

' shown in the dr awings,1

UNITED STATES PATENT OEE CE,

GOMER. w. PRICE, 'OF SAN FRANCISCO, CAL FORNIA YCENTRIFUGAL PUMP.

SPECIFICATION forming part of Letters Patent No. 633,732, datedSeptember 26,

Application filed March 2,"l .898,

Beit known that I, GOMER IV. PRICE, a citizen of the United States,residingat San Francisco, county of San Francisco, and State ofCalifornia, have invented certain new and useful Improvements inGenififugal'P umps; and I herebydeclare the following to be a full,clear, and exact description of the same, reference being had to theaccompanyingdrawings, forming a part of'this specification.

My invention relates to centrifugal pumps for raising and forcing fluidsand to an im-' proved manner of constructing and operating such pumps. I

My improvement consists in so constructing and arranging the impellersof centrifu-i gal pumps that they are relicvodof the resistance causedby the friction of the water on. their sides, the water between theimpellers and pump-casing being at the sides is discharged therefrom bycentrifugal and inductive action, so that the impellers, except on theirperiphery, revolve in air, or in a partial vacuum.

The object of my invention is the avoid ance, in part, of resistance tothe rotation of the impellers and consequent saving in the amount ofpower required to raise or impel water by means of these pumps.

Referring to the drawings herewith and forming a part of thisspecification, Figure I is a side view, partially in section, ofacentrifugal pump constructed according to my invention. Fig. II is anend view of hig. I

.with' the suction-pipe and side plate removed. I Fig.

III is a section through the impeller on the line was in Fig. II,showing the outlets for water from the sides of the impeller. Fig. IV isa section through theimpeller on the line 1 '1 in Fig. III.

In centrifugal pumps having incased impellers a principal source ofresistance and loss of the driving-power, especially at high speed,arises from the friction of the sides of the impellers on thesurrounding water, or in pumps when open or vane impellers are employedby friction of the revolving water against the sides of the pump casingor shell, such friction beingthe same in either case.-

To avoid this friction and consequent loss of power, I constructcentrifugal pumps as being a main frame,

- leys5 or in any. G is the suction-pipe, and 7 the discharge- I igs.III and IV.

1899. Serial n. 675,300. on model.)

parts are supported, 2 the pump casing or volute for collecting anddischarging the water, and 3 the impeller mounted on the spindle 4,driven by the pulother suitable manner.

on which the various pipe.

'8 are the main ducts or passages in the impeller, through ,which thewater flows from the inlet at 9, the impeller being of the in-' closedor incased type and provided with vanes 10 and 11011 the outside-or nextto the' casing Thepassages l3'between the vanes 10 and 1l open obliquelyinward from the sides of the impeller 3, entering the passage 8 near thepoint of discharge, as shown in To prevent the entrance of water betweenthe casing and the front or intake side of the impeller 3, I provide anipple or extension on the end of the suction: pipe 6, that projects ashort distance within the impeller 3, the running-joint being parallelto the axis of rotation, as seen in Fig. I,

.so that the inductive'action of the Water rushing outward in thepassages 8 prevents backflow tures of .thep-ump correspond to commonpractice and do not require further descrip The operation is as follows:being filled with water, the impeller 3 is set in revolution, and thewater in the passages 8 is dischargedoutward in to the volu te 12 partlyby tangential energy, but'mainly by centrif 'ugal force," At the sametime the water at the sides of the impeller 3 is driven out by the vanes10 and Hand is discharged through the apertures 13, aided, however, bythe inductive action of the waterin the passages 8, and as there is nosupply tothese spaces at the sides of the impeller they fill or rartially fill with air, so the impeller 51 is subject to air frictiononly on its sides, thus relieving it of a principal source ofresistance. This action of the-impeller and of the water at its sideshasbeen ascertained by means of apertures temporarily made through thesides of the casing and is a constant result of The impeller 3 beingthus driven Withoutthe usual resistance the construction shown.

of water friction on its sides, consumes less power for a given work andhas otherwise all The casing 2 around thenipple 15., Other fearoo' iherequired functions, the same as if ini mersed in the Water-all over theexterior surfaces.

Having thus explained and described the nature and objects of myinvention and the manner of constructing and applying the same, What Iclaim as new, and desire to secure by Letters Patent, is- I In acentrifugal pump, a volute-easing 2;

an inelosed impeller 3 within said casing provided with interiorwater-passages 8, vanes 10, ll on the outer-sides of said impeller,

sweeping the walls of said casing, and passages 13 through the walls ofthe impeller,

connecting the exterior spaees between the said vanes with the saidinterior water-passages near the point of discharge, whereby thecentrifugal action aided by the indnc-' tive action of theoutwardly-passing current tends to diminish the contents oi the saidspaces and reduce the friction between the impeller and the casing,substantially as specified. I

GOMER- IVV. PRICE.

Vitnesses:

H. SANDERsoN, H.v W. BROWN.

